【作者】 王寅； 黄卫清；

【Author】 Wang Yin,Huang Weiqing (Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

【机构】 南京航空航天大学精密驱动研究所；

【摘要】 利用杆纵振的直线超声波电动机具有输出推力大、效率高和性能可靠的优点,因而得到了广泛的研究。本文设计了一种利用变截面杆纵振模态工作的超声波电动机,该超声波电动机的特点是有两个变截面杆状并由一半圆环连接。位于圆环中间驱动足顶部质点以椭圆轨迹运动,当驱动足以一定预压力接触动子时,动子将输出直线运动。通过定子的有限元模型并对其进行谐响应分析验证了原理的可行性。样机试验表明,该电机可在100mm/s的运行速度下推动10N的负载。更多还原

【Abstract】 Ultrasonic motors adopting longitudinal vibration of bar were widely studied for their considerable thrust,high efficiency and reliability. A novel ultrasonic motor using longitudinal mode of bar with varying section was proposed in this paper. This ultrasonic motor features with two varying section bars connected by semi-circumferential structure. Elliptical trajectories of particles are formed on top of the semi-circumferential structure outer surface where driving tip located and a mover is pushed to move when the driving tip is pressed onto it. FE model of its stator was built and results of harmonic analysis verified its principle. Testing of prototype shows that this motor was capable of a 10N load with speed 100mm/s.更多还原